Preparation of New<i>O</i>-Alkyl Naphthalenecarbothioates and Alkyl Naphthalenecarbodithioates, and EPR-Spectroscopic Study of Their Radical Anions<sup>,</sup>
reaction of the corresponding esters by use of Lawesson's reagent. The related naphthalenecarbodithioates are obtained (a) from methylnaphthalenes via bromination with NBS, subsequent methoxide-promoted reaction with sulfur, and finally alkylation of the carbodithioate salts with alkyl halides or (b) lithiation of bromonaphthalenes, reaction with carbon disulfide, and alkylation. The thiono- and dithioesters
O-烷基萘碳硫酸酯和双-硫代碳酸酯是通过使用劳森试剂使相应的酯反应来制备的。相关的萘碳二硫代烃可通过 (a) 甲基萘通过 NBS溴化,随后与硫进行甲醇促进反应,最后与卤代烷或 (b) 溴代萘的锂化,与二硫化碳反应和烷基化而获得。通过原位电还原将硫代和二硫酯转化为持久性自由基阴离子。自旋密度分布由 EPR 光谱和 MO 计算确定。
Visible-Light-Induced Photoannulation of α-Naphthyl Cyclopropane Carboxylic Esters to Functionalized Dihydrophenalenes
作者:Veronika Schmalz、Ulrich Koert
DOI:10.1021/acs.orglett.1c03784
日期:2022.1.14
BnNMe2 or DABCO as electron donor, HAT-catalyst, and proton source. A broad scope of substituted naphthyl and azanaphthyl derivatives provided the photoannulation products in high yield. Deuteration studies support a photoredox mechanism involving the photoreductive cyclopropane opening to an enolate radical followed by an aryl radical trapping.
Synthesis and Electroluminescent Properties of <i>t</i>-Butylated 2-(2-(4-(Diarylamino)styryl)-4<i>H</i>-chromen-4-ylidene)malononitrile Derivatives for OLED
作者:Kum Hee Lee、Jin Soo Hwang、Min Hye Park、Hyuck Joo Kwon、Young Kwan Kim、Seung Soo Yoon
DOI:10.1080/15421406.2011.599771
日期:2011.11.4
We designed and synthesized new red fluorescent materials based on t-butylated 2-(2-(4-(diarylamino)styryl)-4H-chromen-4-ylidene)malononitrile derivatives (3a-3d). A device using 2-(6,8-di-tert-butyl-2-(4-((4-tert-butylphenyl)(2,7-di-tert-butyl-9,9-diethyl-9H-fluoren-4-yl)amino)styryl)-4H-chromen-4-ylidene)malononitrile (3a) as a dopant showed efficient red electroluminescent properties with a maximum luminance of 3357 cd/m(2) at 15.0 V, and maximum luminous and power efficiencies of 1.12 cd/A and 0.60 lm/W, respectively. The CIE coordinates of this device using this material was (0.64, 0.35) at 7.0 V, and this device also showed stable color chromaticity at various voltages.